Need creative ideas for “accomplishment certificate”

My neighbors and I are putting together something for all the kids in our street ages 4 months-18 years mainly for HS grad, kindergarten grad etc and each kid is going to have some sort of accomplishment certificate!

The only thing I can think of off the top of my head for my little guy is “Promotion to Big Brother”. He’s been walking, sleeping thru the night for a while now so those aren’t really new... he’s only really saying dada or that. 🤔 any other ideas or just stick with big brother?